- double EnergyFraction(double Z, double E);
- double PolarAngle(double E);
+ static void RotateVector(Double_t *pin, Double_t *pout, Double_t costheta, Double_t sintheta,
+ Double_t cosphi, Double_t sinphi);
+ static double ScreenFunction1(double d);
+ static double ScreenFunction2(double d);
+ double RandomEnergyFraction(double Z, double E);
+ double RandomPolarAngle();
+ double RandomMass(Double_t mh);
+ Int_t VirtualGammaPairProduction(TClonesArray *particles, Int_t nPart);